STARTING SEPTEMBER 20, 1984 (JULIAN DATE 264), ON THE THM 475 EV, FI, FS AND HR MODELS FOUR OF THE SIX STUDS IN THE REAR CASES EXTENSION WERE REPLACED WITH 4 BOLTS AS ILLUSTRATED BELOW. WHEN SERVICING ANY OF THE MODELS LISTED ABOVE WHICH HAVE THE SIX STUDS AND REPLACEMENT IS REQUIRED, REPLACE THEM WITH BOLTS, P/N 9424320.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.